Naturalization date
An individual's naturalization date can usually be found on any of the documents listed below. If you have the minimum information required to find one of these documents, select the name of that document. The items in the list are ordered from most to least important. If you do not have the minimum information required, read the paragraph below this list.
Make sure to check photo albums, scrapbooks, diaries, and family Bibles at home. See the topic Finding information at home for more information. Also check for local histories. See the topic Finding previous research.
Finding a naturalization date with naturalization records
You should be able to find an individual's naturalization date from their naturalization papers. Please note that women were not naturalized prior to 1923. They became naturalized citizens with their husbands.
Before September 27, 1906, a person could apply to a local, state, or federal district court to become a naturalized citizen. Therefore, if your ancestor was naturalized before that date, contact the local, state, and federal district courts in the area(s) where your ancestor lived. The clerk of the court should be able to direct you in your search for naturalization papers. In some cases the court will still have the records, and in other cases, the records may have been transferred to a local library or archive. Many federal district court records may have been transferred to the National Archives or to a regional branch of the National Archives. Chapter 3 of the Guide to Genealogical Research in the National Archives lists the location of district court records by state. To contact the National Archives or regional centers, see the topic The National Archives and regional centers.
After September 27, 1906, copies of naturalization papers were sent to the Immigration and Naturalization Service (INS) in Washington, D.C. If your ancestor was naturalized after this date, you can write to the following address and ask for a copy of the form G-641, Application for Verification of Information from Immigration and Naturalization Service Records: Immigration and Naturalization Service, 425 Eye Street N.W., Washington, D.C. 20536.
Finding the minimum information for naturalization records
To find an individual's naturalization date on a naturalization record, you must at least know the individual's full name and approximate date of birth.
Get help finding some of the minimum information by selecting one of the following items:
When you're checking for naturalization records, make sure that you check with the courts in all locations where your ancestor lived during his or her lifetime. The naturalization process took several years, because individuals first had to file papers of intent, then fill the residency requirement, and then file final papers. This means that the papers that you need may not be located in the area where the individual was living at the time that he or she became a citizen. If you would like help locating different places where the individual may have lived see the topic Places the family has lived.
Finding naturalization date with census records
Beginning in 1850, the census recorded the age of each individual in the family at their last birthday. To find out if your ancestor appears in an 1850 or later census, it's easiest to search databases online. Ancestry's census collections have both digitized and scanned copies of every US Census. Even if you don't find the exact name that you need in the index, it is worth it to start looking at all records for families with that surname in the state, as long as the surname isn't too common. For example, if you are looking for Roberto Zubilaga, but only find John Zubilaga and Gianni Zubilaga in the index, look at those records. Using this method, you may come across the family that you are looking for.
At many libraries you can find bound or digital indexes for pre-1880 censuses. Indexes are organized by state and list individuals in alphabetical order by surname, so you don't need to know the county. Different indexes contain different information that will help you find the census record. Some just give you the county that the person lived in; others tell you more. You can find bound indexes at the National Archives and the National Archives regional centers , the Family History Library of the Church of Jesus Christ of Latter-day Saints and branch Family History Centers , and many other libraries. Different locations have different indexes, so check more than one library if you don't find the index that you need. In addition, Soundex indexes are available, with some exceptions, for the years 1880 to 1920. For information about Soundex, see the topic Soundex: what it is and how to use it.
Once you locate your ancestor's name in an index, you will want to look at microfilm copies of the original census records. The original records will help you find the information you need and verify that you have found your ancestor, and not just someone with the same name. Pre-1940 census records are available at the National Archives and National Archives regional centers. Also check with your local public and genealogy libraries, because they may have census records or be part of an interlibrary loan system. In addition, your local Family History Center of the Church of Jesus Christ of Latter-day Saints may either have census records or be able to get copies of them for you.
Access to post-1940 census records is restricted to immediate relatives and descendants. If the individual whose records you are searching for is still living, you must have their written permission to obtain a copy of the record. If the individual is deceased, you must have a certified death certificate. Write to: Bureau of the Census, P.O. Box 1545, Jeffersonville, IN 47131. They will send you a form that you must fill out and return with a fee.
You may also want to check the information contained in state and local censuses. Not all states and localities took their own censuses and the contents vary from state to state. However, sometimes the information is quite valuable. Ancestry has a selection of state census records online , and you can also contact libraries, state archives, and genealogy societies in the area where your ancestors lived. They should be able to tell you if any exist and where you might find them. The Family History Library of the Church of Jesus Christ of Latter-day Saints is another possible source.
Finding the minimum information for census records
To find an individual's naturalization date in census records, you must at least know the individual's name, the state, and the county in which the individual lived when the census was taken.
Get help finding some of the minimum information by selecting one of the following items:
Finding a naturalization date with a passport application
Passport applications can be excellent sources of genealogical information. The information that passport applications contain varies, but can include an individual's name, age, personal description, date and court of naturalization, place of birth, and date and port of arrival into the United States, as well as the name of the ship.
Passport applications from 1791 to 1925 are available through the National Archives. However, applications less than 75 years old may have viewing restrictions. The National Archives has indexes for many applications from 1834-1923. For information about contacting the National Archives, see the topic The National Archives and regional centers.
The National Archives will search their records for you if you have the required information. To send for a request form, write to the National Archives, Civil Reference Branch, Washington, D.C., 20408
Finding the minimum information for passport applications
To find an individual's date of naturalization into the United States on a passport application, you must at least know the individual's name and the year that the application was filed.
Get help finding the minimum information for: